Stop motion



J. O. MCKEAN May 8, 1934.

STOP MOTION Filed Dec. 6, 1930 5 Sheets-Sheet l INVENTOR ATTORNEYS J. O. MCKEAN May 8, 1934.

STOP MOTION ATTORNEYS May 8, 1934. J. o. M KEAN 1,958,050

STOP MOTION Filed Dec. 6, 1930 3 Sheets-Sheet 5 INVENTOR X4. I BY 7 w ATTORNEYS Patented May 8, 1934 UNITED STATES PATET OFFICE STOP MOT ION Application December 6, 1930, Serial No. 500,495 17 Claims. (01. 242-37) The object of my invention is to provide certain improvements in the construction, form and arrangement of the several parts of a stop motion for winding machines in which the winding of the package is automatically stopped when the yarn breaks or becomes exhausted.

One feature of my invention comprises the provision of a tripping mechanism for the stop motion, which tripping mechanism includes a tripping roller arranged, when the thread or yarn breaks or becomes exhausted, to be moved into the path of and preferably in contact with a rotary kicker cam for operation thereby with a rolling contact.

Another feature of my invention is the provision of means whereby a metal to metal contact is eliminated between the kicker cam and the tripping roller, in the present instance by making the roller of some suitable non-metallic material, such, for instance, as hard fiber.

Other features of my invention include means for preventing the package spindle, when empty, from dropping down on to the winding roll and causing injury thereto; and means whereby the detector wire may be depressed and held depressed by the hand lever until the detector lever is held normally depressed by the yarn under tension as the package starts winding.

A practical embodiment of my invention is represented in the accompanying drawings, in which:

Fig; 1 represents a vertical transverse section through so much of a winding machine as will give a clear understanding of my improved stop motion, the parts being in the positions they assume when the yarn has broken or become exhausted and the package lifted away from its winding roll;

Fig. 1 represents the stop motion cover in front elevation.

Fig. 2 represents a detail section showing the parts in the positions they assume when the hand 'lever has been fully depressed for depressing and holding the detector wire temporarily depressed and for lifting the package controlling rack bar out of engagement with its lever arm;

Fig. 3 represents a view similar to Fig. l with the parts in the positions they assume under normal running conditions; and

Fig. 4 represents a detail view showing the positions which the parts assume just after the yarn has broken and the tripping roller has been moved into contact with the kicker cam by the release of the detector wire because of the breakage or exhaustion of the yarn.

The winding roll 1 revolves the package 2 by the, frictional. surface contact therewith, which package in the presentinstance isshown as a cop. The package is carried by the forwardly projecting arm 3 of a rock levermounted on a shaft 4, the depending arm 5 of which rock lever has hinged thereto at 6 the rear end of. a rack bar '7. The ratchet toothedportion 8 of the rack bar normally engages a tooth 9 on the depending arm 10 of a rock lever loosely mounted on a pivot pin 11, which lever has an uprising arm 12 to which one end of a coil spring 13 is attached for yieldingly holding the depending arm 10 at the limit of its rearward movement with its stop 14 in engagement with the frame bar 15. A coil spring 16 connects the depending lever arm 5 with the rack bar '7 in position to ensure the engagement of the toothed portion 8 of the rack bar with the tooth 9 of the depending loose lever arm 10.

The traverse guide 17 for the yarn is'reciprocated in the usual manner by a cam 18 fast on the cam shaft 19. This cam shaft 19 also carries a kicker cam 20, preferably provided with a single lobe, which cam serves as a part of the tripping mechanism for the stop motion.

The detector wire 21 of the tripping mechanism is normally held. depressed by the yarn as it passes to the package during the winding thereof. This detector wire is carried by a rock lever 22 which swings on a pivot pin 23 carried by the latch lever 24 of the tripping mechanism, which latch lever in turn swings on a pivot pin 25. An eccentric tripping roller 26 is carried by the detector lever 22. A metal to metal contact between the kicker cam and tripping roller is obviated in the present instance by making the roller of some suitable non-metallic material, such, for instance, as hard fiber. This eccentric tripping roller is normally held out of the path of the kicker cam by the depression of the detector wire 21 due to its contact with the yarn as it passes to the package. Should the yarn break or become exhausted the tripping roller 26 will be automatically swung into the path of and in the present instance into rolling contact with the kicker cam 20 the moment the detector 'wire'21 is permitted to rise.

The end of the spring 13 opposite to that which is attached to the uprising arm 12 of the rack engaging lever is attached to the latch lever 24 for normally holding the latch lever in its operative position in engagement with the hand lever. V

A three armed hand lever 27, 28, 29 swings on the pivot pin 11. A spring 30 is attached at one end to the uprising arm 28 of the hand lever and at its other end to the frame for swinging the hand lever to its raised position when it is released by the latch lever 24 of the tripping mechanism. The forwardly projecting arm 27 of the hand lever is provided with an extension 31 which is developed into a handle 32 for depressing the lever. The rearwardly projecting arm 29 of the hand lever is provided with a hook pin 33 arranged to raise the ratchet toothed portion 8 of the rack bar out of engagement with the tooth 9 of the depending lever arm 10 when the hand lever is depressed to its full extent, as shown in Fig. 2. I

The stop motion cover 34 swings on a pivot pin 35 carried by the forwardly projecting arm 2'7 of the hand lever, which pin 35 also coacts with the latch lever 24, to cause the latch lever to hold the hand lever in its nearly depressed position, shown in Fig. 3, when the package is being wound. A yarn bar 36 is carried by this cover 34 and extends in close proximity to the traverse guide17. A screw 3'7 carried by the cover 34 and slidably engaged with the frame is used for adjusting the position of the cover, a spring 38 serving to yieldingly hold the cover in its adjusted position. The bobbin from which the yarn is fed is denoted by 39 and the normal path of the yarn by 40. The tension device through which the yarn is passed is denoted by 41.

The one-way interlocking connection between the hand lever and the latch bar controlling lever is shown as comprising an offset lug 42 on the depending lever arm 10, arranged in position to be engaged by a depending lug 43 on the hand lever.

The spindle of the package 2, when the empty cone is taken off, is prevented from falling down into contact with the roll and injuring it by pro- ,viding the fixed plate 44 on the friction collar 45 which is secured to the shaft 4, with an offset :lug 46 arranged in position to engage a lug 46 on the arm 3 and act as a stop therefor. The

. engagement of these two lugs will limit the downward movement of the arm 3 before the spindle comes into contact with the winding drum.

An offset clip 4'? is adjustably carried by the stop motion cover 34 in position to engage the detector wire 21 and depress the same below the normal path 40 of the yarn, when the hand lever is fully depressed.

In operation:

To start the winding of the package the hand lever is fully depressed into the position shown in Fig. 2, thereby causing the clip 47, by its engagement with the detector wire, to depress the detector wire below the path 40 of the yarn. This full depression of the hand lever will also cause the hook pin 33 to raise the rack lever 7 out of engagement with the lever arm 10, thereby permitting the package 2 to drop down on to the winding roll 1. The spring 13 is permitted to swing the lever arm to the limit of its rearward movement. As soon as the yarn starts winding the hand lever is released and it will immediately rise slightly to the position shown in Fig. 3 where its pin 35 will be engaged by the latch lever 24 {to releaseably lock the hand lever in position. This depression of the hand lever will also, because of its depression of the stop motion cover 34 and the yarn bar 36, permit the yarn to drop into the traverse guide 17.

When the yarn breaks or becomes exhausted,

the detector wire 21 will be permitted to rise into the position shown in Fig. 4, thereby causing the eccentric tripping roller 26 to be moved into the path of and preferably into rolling contact with the kicker cam 20, as shown in Fig. 4. As the kicker cam revolves it will throw the roller out of the path of the cam and thereby swing the latch lever forwardly causing it to be disengaged from the latch pin 35 on the hand lever. The spring 30 immediately raises the hand lever to the position shown in Fig. 1, thereby causing the lever arm 10, because of its one-way interlocked connection 42, 43 with the hand lever to pull the rack bar 7 forwardly, to lift the package ofi? from the winding roll 1. The spring 16 ensures the locking engagement between the rack bar 7 and the depending lever arm 10 when released from the hook pin 33, thereby maintaining the package in its raised position, out of contact with the winding roll. This lifting movement of the hand lever also raises the stop motion cover 34 and causesits yarn bar' 36 to disengage the yarn from the traverse guide 17.

By providing the eccentric tripping roll 26 it will be more quickly operated by the kicker cam 20 when in rolling contact therewith. This rolling contact between the kicker cam and tripping roll serves to materially reduce the frictional wear at this point. Furthermore, by making one of the parts, as, for instance, the tripping roller of some suitable non-metallic material, such as hard fiber, the metal to metal shock on the parts will be eliminated.

It is evident that various changes may be resorted to in the construction, form and arrangement of the several parts without departing from the spirit and scope of my invention, and hence I do not intend to be limited to the particular embodiment herein shown and described.

What I claim is: V

1. In a winding machine, a stop motion and a tripping mechanism therefor comprising a kicker cam and an eccentric tripping rollerarranged to be moved into the path of the cam when the yarn breaks or becomes exhausted.

2. In a winding machine, a stop motion and a tripping mechanism therefor comprising a kicker cam and a tripping roller arranged to be moved into rolling contact with the cam when the yarn .to be moved into rolling contact with the cam when the yarn breaks or becomes exhausted.

4. In a winding machine, a stop motion and a tripping mechanism comprising a kicker cam, a latch lever and a tripping roller carried thereby and arranged to be moved into the path of the cam when the yarn breaks or becomes exhausted.

5. In a winding machine, a stop motion and a tripping mechanism comprising a kicker cam, a latch lever and an eccentric tripping roller carried thereby and arranged to be moved into the path of the cam when the yarn breaks or becomes exhausted.

6. In a winding machine, a stop motion and a tripping mechanism comprising a kicker cam, a latch lever, a rock lever pivotally mounted on the latch lever, a detector wire carried by the rock lever and a tripping roller also carried by the rock lever and arranged to be moved into rolling contact with the kicker cam when the yarn breaks or becomes exhausted. V I

'7. In a winding machine, a stop motion and. a I

tripping mechanism therefor comprising a kicker cam, a latch lever, a detector lever carried thereby and a tripping roller carried by the detector lever and arranged to be moved into the path of the cam when the yarn breaks or becomes exhausted.

8. In a winding machine, a stop motion including a hand lever and a stop motion tripping mechanism comprising a latch lever for engaging the hand lever, a kicker cam and a tripping roller carried by the latch lever and arranged to be moved into the path of the cam when the yarn breaks or becomes exhausted.

9. In a winding machine, a stop motion including a hand lever and a stop motion tripping mechanism comprising a latch lever for engaging the hand lever, a kicker cam, a detector lever carried by the latch lever and an eccentric tripping roller carried by the detector lever and arranged to be moved into the path of the cam when the yarn breaks or becomes exhausted.

10. In a winding machine, a package holding lever and a stop motion comprising a rack bar pivoted to one arm of the lever, a rack bar oper ating lever and spring means for ensuring the locking engagement of the rack bar with its operating lever.

11. In a winding machine, a package holding lever and a stop motion comprising a rack bar pivoted to one arm of the lever, a rack bar operating lever and a spring connecting the rack bar and said arm for ensuring the locking engagement of the rack bar with its operating lever.

12. In a winding machine, a winding roll, a package holding lever including the package spindle, a stop motion for controlling the movement of the lever toward and away from the winding roll and a device for limiting the downward movement of the lever to retain the package spindle at all times out of contact with the winding roll.

13. In a winding machine, a stop motion comprising a hand lever having an intermediate locked position and a tripping mechanism including a detector wire and means operated by the full depression of the hand lever beyond its intermediate locked position for depressing the detector wire into position to be engaged and held depressed by the yarn when wound, after the hand lever has been permitted to rise slightly to its locked position.

14. In a winding machine, a stop motion comprising a hand lever having an intermediate locked position, a stop motion cover carried by the hand lever and a tripping mechanism including a detector wire and a clip carried by the cover, operated by the full depression of the hand lever beyond its intermediate locked position for depressing the detector wire into position to be engaged and held depressed by the yarn when wound, after the hand lever has been permitted to rise slightly to its locked position.

15. In a winding machine, a stop motion comprising a hand lever having an intermediate locked position, a stop motion cover and a yarn bar both carried by the hand lever and a tripping mechanism including a detector wire and. a clip carried by the cover, operated by the full depression of the hand lever beyond its inter- 100 mediate locked position for depressing the detector wire into position to be engaged and held depressed by the yarn when wound, after the hand lever has been permitted to rise slightly to its locked position.

16. In a winding machine, a stop motion including a hand lever, a stop motion cover and a yarn bar both carried by the hand lever and means for adjusting the position of the cover and its yarn bar.

17. In a winding machine, a frame, a stop motion including a hand lever, a stop motion cover and a yarn bar both carried by the hand lever and an adjusting screw carried by the cover and having a sliding engagement with the frame for 115 adjusting the position of the cover and its yarn bar and a spring for yieldingly holding the cover in its adjusted position.

JOHN O. MCKEAN. 

